I cannot seem to find an agreement on the proper capitalisation of geographical entities that use common nouns as part of their full name.
Specifically my example is:
...was found in the Pacific, Southern, and Indian Oceans.
since both Pacific Ocean and Indian Ocean etc. are the correct terms.
or should it be:
...was found in the Pacific, Southern, and Indian oceans.
As, strictly speaking, Oceans (plural) is not part of either name?